A survey on the historical nature of the central vowels in the peripheral Japanese dialects.

为了把握周边日语方言中心元音的历史性质，2003-2004年的调查从以下几个方面进行，特别是以琉球方言为重点：1）以笔者编制的语音数据库为基础的历史考察; 2）针对有中心元音的方言，通过田野调查，完成语音数据库的建立; 3）关于在包括琉球方言和东北方言的日语历史中中央元音的产生的假设的形成对于1，《日本语音学会会刊8-1》发表了“一语本”北方奄美方言的历史性质“，《北方奄美方言的音位系统特征》发表在“岩手大学教育学院年度报告63”。关于2，在琉球群岛南部的波照间岛（2003年）和竹富岛（2004年）进行了系统的语音研究，并使用DAT进行了数字录音。关于3，“Zuzu-Ben（有中央元音的方言）是否是古老的方言？”是研究者在Gandai-Gobun-Gakkai（岩手大学语言文学研究学会）年会上发表的讲话。在这次演讲中，研究者提出了假设，首次阐明了包括琉球方言和东北方言在内的日本语言集中化的整个过程。

To grasp the historical nature of the central vowels in peripheral Japanese dialects, the investigation in 2003-2004 has been executed through the following points of view, especially focusing on the Ryukyuan dialects1)the historical survey based on the sound data-base that has been compiled by the investigator2)the completion the sound data-base through the field research aiming at the dialects that have the central vowels3)formulation of the hypothesis on the generation of the central vowels in the history of the Japanese language including both the Ryukyuan dialects and the Tohoku dialectsAs for 1, 'The Historical Nature of the mon "Hitotsgana-Ben" Northern Amami Dialects' was published in "Journal of the Phonetic Society of Japan 8-1" and 'The Characteristics of the Phonemic Systems of the Northern Amami Dialect' was printed in "Annual Report of the Faculty of Education Iwate University 63".As for 2, a systematic phonological research and a digital-recording using DAT was executed at Hateruma island in 2003 and at Taketomi island in 2004, both located in Southern part of the Ryukyu archipelago.As for 3, 'Whether Zuzu-Ben (the dialects that have the central vowels) is old one or not?' was addressed by the investigator at the annual conference of Gandai-Gobun-Gakkai (The Society for the Study of Language and literature at Iwate University). In this lecture the investigator presented the hypothesis which first clarified the total process of centralization of Japanese language including the Ryukyuan dialect and the Tohoku dialect.